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Mergers of neutron stars are believed to be one of the primary sites for the synthesis of the universe's heavy elements via the rapid neutron capture process. AT2017gfo, the kilonova following GW170817 provided the first direct…

高能天体物理现象 · 物理学 2026-04-08 Aayush Arya , Rasmus Damgaard , Albert Sneppen , David J. Dougan , Stuart A. Sim , Connor P. Ballance , Darach Watson

A macronova (kilonova) was discovered with a short gamma-ray burst, GRB 130603B, which is widely believed to be powered by the radioactivity of $r$-process elements synthesized in the ejecta of a neutron star binary merger. As an…

高能天体物理现象 · 物理学 2015-06-23 Shota Kisaka , Kunihito Ioka , Hajime Takami

After the jet break at $t\sim 1.4$ days, the optical afterglow emission of the long-short burst GRB 060614 can be divided into two components. One is the power-law decaying forward shock afterglow emission. The other is an excess of flux in…

高能天体物理现象 · 物理学 2016-03-16 Zhi-Ping Jin , Yi-Zhong Fan , Da-Ming Wei

We study long-term evolution of the matter ejected in a black-hole neutron-star (BH-NS) merger employing the results of a long-term numerical-relativity simulation and nucleosynthesis calculation, in which both dynamical and post-merger…

In this paper, we compute and analyze synthetic radio images of gamma-ray bursts and kilonova afterglows. For modeling the former, we consider GRB170817A-inspired set of parameters, while for the latter, we employ ejecta profiles from…

高能天体物理现象 · 物理学 2023-08-02 Vsevolod Nedora , Tim Dietrich , Masaru Shibata

We present a new analysis of the JWST infrared spectra of GRB 230307A (AT 2023vfi), a long gamma-ray burst (GRB) with an infrared excess and spectral lines suggestive of significant heavy $r$-process production. The spectra, taken 29 and…

高能天体物理现象 · 物理学 2025-10-21 Prasiddha Arunachalam , Phillip Macias , Ryan. J. Foley

We present a cadence optimization strategy to unveil a large population of kilonovae using optical imaging alone. These transients are generated during binary neutron star and potentially neutron star-black hole mergers and are…

GRB 191019A was a long Gamma-ray burst (GRB) lasting about 65 s and, as such, originally thought to be linked to a core-collapse supernova. However, even though follow-up observations identified the optical counterpart close to the bright…

The contemporaneous detection of gravitational waves and gamma rays from the GW170817/GRB 170817A, followed by kilonova emission a day after, confirmed compact binary neutron-star mergers as progenitors of short-duration gamma-ray bursts…

We present uniform modeling of eight kilonovae, five following short gamma-ray bursts (GRBs; including GRB170817A) and three following long GRBs. We model their broadband afterglows to determine the relative contributions of afterglow and…

高能天体物理现象 · 物理学 2024-11-26 J. C. Rastinejad , W. Fong , C. D. Kilpatrick , M. Nicholl , B. D. Metzger

The recent discovery of the neutron star merger and multi-messenger event GW170817 (also known as kilonova GRB170817A) provides an unprecedented laboratory in which to study these mysterious objects, as well as an opportunity to test…

高能天体物理现象 · 物理学 2019-01-01 Samar Safi-Harb , Neil Doerksen , Adam Rogers , Chris L. Fryer

Kilonovae produced by mergers of binary neutron stars (BNSs) are important transient events to be detected by time domain surveys with the alerts from the ground-based gravitational wave detectors. The observational properties of these…

高能天体物理现象 · 物理学 2023-04-19 Chunyang Zhao , Youjun Lu , Qingbo Chu , Wen Zhao

Kilonovae, one source of electromagnetic emission associated with neutron star mergers, are powered by the decay of radioactive isotopes in the neutron-rich merger ejecta. Models for kilonova emission consistent with the electromagnetic…

Kilonovae are optical transients following the merger of neutron star binaries, which are powered by the r-process heating of merger ejecta. However, if a merger remnant is a long-lived supramassive neutron star supported by its uniform…

高能天体物理现象 · 物理学 2023-11-28 Hao Wang , Paz Beniamini , Dimitrios Giannios

We analyse the tidal disruption probability of potential neutron star--black hole (NSBH) merger gravitational wave (GW) events, including GW190426_152155, GW190814, GW200105_162426 and GW200115_042309, detected during the third observing…

高能天体物理现象 · 物理学 2021-11-12 Jin-Ping Zhu , Shichao Wu , Yuan-Pei Yang , Bing Zhang , Yun-Wei Yu , He Gao , Zhoujian Cao , Liang-Duan Liu

GRB 160821B is a short duration gamma-ray burst (GRB) detected and localized by the Neil Gehrels Swift Observatory in the outskirts of a spiral galaxy at z=0.1613, at a projected physical offset of 16 kpc from the galaxy's center. We…

Black hole-neutron star mergers are among the promising gravitational-wave sources for ground-based detectors, and gravitational waves from black hole-neutron star mergers are expected to be detected in the next few years. Simultaneous…

高能天体物理现象 · 物理学 2016-09-05 Kyohei Kawaguchi , Koutarou Kyutoku , Masaru Shibata , Masaomi Tanaka

Near Infrared (NIR) and optical photometry and spectroscopy are presented for the nova V1831 Aquilae, covering the early decline and dust forming phases during the first $\sim$90 days after its discovery. The nova is highly reddened due to…

太阳与恒星天体物理 · 物理学 2017-11-15 D. P. K. Banerjee , Mudit K. Srivastava , N. M. Ashok , U. Munari , F. -J. Hambsch , G. L. Righetti , A. Maitan

We predict linear polarization for a radioactively-powered kilonova following the merger of a black hole and a neutron star. Specifically, we perform 3-D Monte Carlo radiative transfer simulations for two different models, both featuring a…

高能天体物理现象 · 物理学 2020-12-16 M. Bulla , K. Kyutoku , M. Tanaka , S. Covino , J. R. Bruten , T. Matsumoto , J. R. Maund , V. Testa , K. Wiersema

Kilonovae represent an important electromagnetic counterpart for compact binary mergers, which could become the most commonly detected gravitational wave (GW) source. Follow-up observations, triggered by GW events, of kilonovae are…

高能天体物理现象 · 物理学 2016-01-13 Imre Bartos , Tracy L. Huard , Szabolcs Marka